Electric Currents and Distribution of Power in your House

When : Oct 23, Saturday,
Where : Van Allen Hall, Room 70

Professor Craig Kletzing & Dr. Li-Jen Chen
The City of Chicago Lit up at Night
Electric Light Used  to See after Dark




Power Stations Supply the Necessary Power Needed to Serve the Community


             
The power plant  sends electricity through a grid of power lines. First, big transmission wires on tall towers  carry electricity to places called SUBSTATIONS in different neighborhood. These substations contain equipment that reduces electricity's voltage so it can travel on small power lines that brach out down streets, either on overhead power lines or lines burried underground.


  

Overhead and underground power lines carry electricity to transformers on poles or on the ground, where the voltage  of electricity is reduced again so people can use it safely. (Transformers and substations contain equipment that is very dangerous to touch; that's why they have warning signs on them.)

                           

From transformers, electricity travels into buildings through wires called service drops. These connect to a meter box, which measures how much electricity is being used, and to all the wires that run inside walls to outlets and switches.



Here is a pictorial description of the power transfer process, from the power station to your home: